Multiple choice general knowledge

What is the Percentage of oxygen in air?

  1. 16.676%

  2. 29.836%

  3. 11.238%

  4. 20.946%
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Earth's atmosphere contains approximately 20.946% oxygen by volume, making nitrogen the most abundant gas at about 78%. The other values (16.676%, 29.836%, 11.238%) are incorrect. This is a fundamental fact in atmospheric science and chemistry.

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